Assertion : Serum cannot clot the blood.
Reason: Serum is obtained from blood plasma minus blood-clotting proteins like prothrombin and fibrinogen.

Options

A. If both Assertion and Reason are true and Reason is correct explanation of Assertion
B. If both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
C. If Assertion is true but Reason is False
D. If both Assertion and Reason are false

Answer

To solve the question regarding the assertion and reason, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
The assertion states: "Serum cannot clot the blood."
- This statement is true. Serum is the liquid part of blood that remains after the blood has clotted. Since the clotting factors are removed during the clotting process, serum does not have the ability to clot.

### Step 2: Analyze the Reason
The reason states: "Serum is obtained from blood plasma minus blood-clotting proteins like prothrombin and fibrinogen."
- This statement is also true. Serum is derived from blood plasma after the clotting factors (including prothrombin and fibrinogen) have been removed. Therefore, the reason correctly explains the nature of serum.

### Step 3: Determine the Relationship
Now we need to determine if the reason correctly explains the assertion.
- Since the reason accurately describes why serum cannot clot the blood (because it lacks the necessary clotting proteins), we can conclude that the reason is a correct explanation of the assertion.

### Conclusion
Both the assertion and the reason are true, and the reason is the correct explanation for the assertion. Therefore, the correct answer is:
1. Both Assertion and Reason are True and Reason is the correct explanation of Assertion.